its a know fact that wow CANNOT access more than 2gb of memory before crashing even WITHOUT addons, it seems to be more and more apparrent since the last patch though.
..::EDIT::..
Infact I just found a blue post confirming this fact,
http://forums.worldofwarcraft.com/th...43889302&sid=1
..::EDIT::..
On one machine since the last patch it will slowly rise up to 1.75gb and then crash out with a mapmem.cpp error and I do NOT use addons on that machine which has 6Gb of ram.
Even a fresh install of the os and wow didnt change it..... maybe an hour or two in and the same error or something similar.